我在GridView
的标头中有一个DropDownList
,我将其数据绑定在RowDataBound
中,并将其放置在UpdatePanel
中。我希望在选择(回发)后保留选定的值。怎样
在这里我填写下拉列表
受保护的子gvStaffList_RowDataBound(发送方为对象,e为System.Web.UI.WebControls.GridViewRowEventArgs)处理gvStaff List.RowDataBound
If e.Row.RowType = DataControlRowType.Header Then
' Fill the header dropdownlist from the datatable and displaying only the unique values (NOT from database directly)
' ============================= Supervisor name ======================================================
Dim ddlSupervisors As DropDownList = DirectCast(e.Row.FindControl("ddlSupervisors"), DropDownList)
For x As Integer = 0 To data.Rows.Count - 1
If ddlSupervisors.Items.FindByValue(data.Rows(x).Item("SuperId")) Is Nothing Then
ddlSupervisors.Items.Add(New ListItem(data.Rows(x).Item("SuperName"), data.Rows(x).Item("SuperId")))
End If
Next
ddlSupervisors.Items.Insert(0, New ListItem("All", "All"))
' ============================= Supervisor name ======================================================
Dim ddlPostTitle As DropDownList = DirectCast(e.Row.FindControl("ddlPostTitle"), DropDownList)
For x As Integer = 0 To data.Rows.Count - 1
If ddlPostTitle.Items.FindByValue(data.Rows(x).Item(1)) Is Nothing Then
ddlPostTitle.Items.Add(New ListItem(data.Rows(x).Item(1), data.Rows(x).Item(1)))
End If
Next
ddlPostTitle.Items.Insert(0, New ListItem("All", "All"))
hello使用类似的会话:
Session["selecteditem"] = "your value";
关于c#;-)
您可以在IndexChanged事件期间将其存储在会话中,然后将其收回。
试着在回发后再次填充下拉列表,然后在再次填充后可以保留下拉列表的选定值。
试试看,如果有任何问题,请告诉我